I booted into live CD and I got the options where you can try elementary OS or install it, but every time I choose one of them it turns into a black screen and then after a few second my monitor can't detect a signal from my computer. This never happened to me on other distros just on this one. I have an AMD A6-7400k with r5 graphics and 4gb of ram

  • error No UMS support in radeon module i got this far
    – luka
    Apr 17 '17 at 2:03
  • Also same problem installing on a 2008 Macbook Pro - nomodeset solution worked for me too
    – simonn
    Apr 18 '19 at 20:20

Try launching your kernel with nomodeset option, following this instructions:

  • During the boot process, press and hold SHIFT key. Now you can see the grub menu.

  • Press e key on first line to edit it.

  • Go to line with the quiet splashsentence. Something like: linux /boot/vmlinuz-4.4.0-57-generic root=UUID=xxxx-xxxx-xxxxx ro quiet splash.

  • Add the nomodeset option between ro and quiet splash. You must see someting like: linux /boot/vmlinuz-4.4.0-57-generic root=UUID=xxxx-xxxx-xxxxx ro nomedeset quiet splash.

  • Press Ctrl + X to boot the kernel.

Report your experience to help others.

  • 1
    I had same problem.. I tried what @bitseater says with nomodeset. I successfully booted to livecd and install Elementary OS :)
    – johhhnnyy
    Feb 15 '17 at 17:21
  • I don't see a uuid for the root= it says maybe casper . When I set nomodeset, it shuts off and restarts. Mar 4 '20 at 10:53

Not the answer you're looking for? Browse other questions tagged or ask your own question.